Georg carl bracklow



Patented Dec. I3, |898. G. C. BRACKLDW. CUULING MEANS FUR EXPLOSIVE ENGINES.

(Applicmcm med sept. 2v, 1691.)

(No Model.)

enter to interfere With the smooth Workingof the motor.

The motor may be Worked with any of the known explosive mixtures of air with hydrocarbon gases or liquids.

Having thus described iny invention, what I claim, and desire to secure by Letters Patent, is-

l. In agas engine or motor, the combination of the engine-cylinder and the Working piston, of a cooling-chamber surrounding the engine-eylinderand isolated from the explosionehamber, and a subpiston attached to the engine-piston and operating to cause a circulation of a cooling medium through the coolingchamber, substantially as set forth.

2. Inagas engine or motor, the combination of the englne-cylinder and the Working piston, a cooling-chamber surrounding and isolated from the engine-cylinder, valved inlet and outlet passages leading to and from said cooling-ehamber, and a subpiston forming part of the main piston and Working in the cooling-chamber to draw the cooling medium into and expel it from said chamber, substantially as set forth.

In agas engine or motor, the combination of the open-ended engine-cylinder, the hollow Working piston inclosing the open end of the cylinder, a coolingchamber surrounding the engine-cylinder, and isolated from the conlbustion-cham ber, Valved inlet and outlet passages to and from the cooling-chamber, and a subpiston forming part of the Working piston and adapted to circulate a cooling medium through the cooling-chamber, substantially as set forth.

et. In a gas engine or motor, the combination l of the open-ended en gine-cylinder, the hollow Working piston inclosing the en gine-cylinder and covering its open end, a cooling-chamber surrounding the engine-cylinder and Within the Working piston, a second coolingcha1nber surrounding the first cooling-chain ber and the Working piston, said cooling chambers being isolated from the eoinbustioirehamber and in communication with each other, a subpiston on vthe Working piston operating in said seeond cooling-chamber, and inlet and outlet passages to and from the cooling-chambers7 substantially as set forth.

5. In a gas engine or motor, the combination of the open-ended engine-cylinder, the Working piston inclosing the engine-cylinder and covering its open end, a cooling-chain ber surrounding the engine-cylinder and located Within the Working piston, outlet-passages leading from the cooling-chamber adjacent to its forward end to an outlet-chamber for theeooling111edium,asecond cooling-chamber surrounding the first cooling-chamber and working piston, an inlet for the cooling medium entering the second cooling-chamber adjacent to its forward end, ports co1nmunieating between the cooling-chambers adjacent to their rear ends, and a subpiston formed on the working piston and operating in the second cooling-chamber, substantially as and for the purpose set forth.

In Witness whereof I have hereunto set my hand in presence of two witnesses.

GEORG CARL BRACKLO \V.

lVitnesses:

HERMANN SCHMIDT, OARLL CHEINBERGER. 

